Refactor and move ash independent nested accelerator code to ui/wm/core

ash/accelerators/accelerator_dispatcher_win.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ash/accelerators/accelerator_dispatcher.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_pump_dispatcher.h"
-#include "base/run_loop.h"
-#include "ui/events/event.h"
-
-using base::MessagePumpDispatcher;
-
-namespace ash {
-
-namespace {
-
-bool IsKeyEvent(const MSG& msg) {
-  return msg.message == WM_KEYDOWN || msg.message == WM_SYSKEYDOWN ||
-         msg.message == WM_KEYUP || msg.message == WM_SYSKEYUP;
-}
-
-}  // namespace
-
-class AcceleratorDispatcherWin : public AcceleratorDispatcher,
-                                 public MessagePumpDispatcher {
- public:
-  explicit AcceleratorDispatcherWin(MessagePumpDispatcher* nested)
-      : nested_dispatcher_(nested) {}
-  virtual ~AcceleratorDispatcherWin() {}
-
- private:
-  // AcceleratorDispatcher:
-  virtual scoped_ptr<base::RunLoop> CreateRunLoop() OVERRIDE {
-    return scoped_ptr<base::RunLoop>(new base::RunLoop(this));
-  }
-
-  // MessagePumpDispatcher:
-  virtual uint32_t Dispatch(const MSG& event) OVERRIDE {
-    if (IsKeyEvent(event)) {
-      ui::KeyEvent key_event(event, false);
-      if (MenuClosedForPossibleAccelerator(key_event))
-        return POST_DISPATCH_QUIT_LOOP;
-
-      if (AcceleratorProcessedForKeyEvent(key_event))
-        return POST_DISPATCH_NONE;
-    }
-
-    return nested_dispatcher_ ? nested_dispatcher_->Dispatch(event)
-                              : POST_DISPATCH_PERFORM_DEFAULT;
-  }
-
-  MessagePumpDispatcher* nested_dispatcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(AcceleratorDispatcherWin);
-};
-
-scoped_ptr<AcceleratorDispatcher> AcceleratorDispatcher::Create(
-    MessagePumpDispatcher* nested_dispatcher) {
-  return scoped_ptr<AcceleratorDispatcher>(
-      new AcceleratorDispatcherWin(nested_dispatcher));
-}
-
-}  // namespace ash